Turn off case fans


I have some dumb case fans. They plug in with the molex connector and run at the same RPM 100% of the time there is power. The computer could be doing nothing and yet the fans are blowing non-existent heat out at the same rate as if it were trying to create a virtual matrix-like world. So what I'd actually like to do is:

if the temperature inside the case is:
* > 30°C/86°F switch the case fans on
* < 25°C/77°F switch the case fans off

i.e. if it's hot, turn them on. If it's cool, switch them off. Make it a 5° difference so they're not always toggling on and off - i.e. if the temperature is between the two values, then the fans continue to do/not do what they were/weren't.

To me this seems like common sense?

Anyone know how to do it? Or if there's a product?

Not REALLY an overclocking question, I know.
2 answers Last reply
More about turn case fans
  1. Speedfan allows you to do that. But with Molex you are constantly supplying 12volts so it should spin 100 all the time. Didnt your fans come with 3pin/4pin connectors?
  2. whoops - found it - moderators if it sounds like an ad then delete it :) http://atechfabrication.com/products/Temperature_Switch.htm
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